Explanation:

- "She tries to adjust with her relations."

- This suggests she is trying to change or adapt her behavior or attitude in her relationships with others. It correctly signifies making adjustments in relationships.

- Correct Answer

- "She tries to adjust so her relations."

- This phrase is incomplete and does not make sense. "So" typically expresses purpose but needs more context.

- "She tries to adjust at her relations."

- This option is incorrect as "at" is not typically used for discussing adjustments in relationships.

- "She tries to adjust because her relations."

- "Because" introduces a reason, but this usage is grammatically incorrect without additional information.